Wire EDM excels with 4140 steel, particularly in the hardened condition where conventional machining becomes difficult. EDM is unaffected by material hardness.
| Parameter | Value |
|---|---|
| Achievable Tolerances | ±0.005 mm |
| Surface Finish | Ra 0.2-0.8 μm |
| Cutting Speed | Moderate to fast |
| Feed Rate | Auto-tuned by EDM controller |
| Tooling Recommendations | Brass wire standard. Zinc-coated for roughing speed. |
Can cut hardened (60 HRC) material with ease
Excellent for die and mold applications
Multiple skim passes for precision tooling
Stress relief recommended for precision work
Die profiles
Punch shapes
Keyways in hardened shafts
Gear profiles
Spline cuts
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